151743991 has 4 divisors (see below), whose sum is σ = 173421712. Its totient is φ = 130066272.

The previous prime is 151743967. The next prime is 151744063. The reversal of 151743991 is 199347151.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 151743991 - 2⁵ = 151743959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151743931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10838850 + ... + 10838863.

It is an arithmetic number, because the mean of its divisors is an integer number (43355428).

Almost surely, 2^151743991 is an apocalyptic number.

151743991 is a deficient number, since it is larger than the sum of its proper divisors (21677721).

151743991 is an equidigital number, since it uses as much as digits as its factorization.

151743991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21677720.

The product of its digits is 34020, while the sum is 40.

The square root of 151743991 is about 12318.4410945541. The cubic root of 151743991 is about 533.3805408300.

The spelling of 151743991 in words is "one hundred fifty-one million, seven hundred forty-three thousand, nine hundred ninety-one".